package com.sky.aspect;


import com.sky.annotation.AutoFill;
import com.sky.constant.AutoFillConstant;
import com.sky.context.BaseContext;
import com.sky.enumeration.OperationType;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.Signature;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.time.LocalDate;
import java.time.LocalDateTime;

@Aspect
@Component
@Slf4j
public class AutoFillAspect {
    @Pointcut("execution(* com.sky.mapper.*.*(..)) && @annotation(com.sky.annotation.AutoFill)")
    public void autoFillPointCut(){}

    @Before("autoFillPointCut()")
    public void autoFill(JoinPoint joinPoint){
        log.info("开始进行公共字段自动填充...");

        //先获得注解中的operationtype
        MethodSignature signature = (MethodSignature) joinPoint.getSignature();
        AutoFill annotation = signature.getMethod().getAnnotation(AutoFill.class);
        OperationType operationType=annotation.value();
        //需要赋值的数据
        LocalDateTime now=LocalDateTime.now();
        Long id= BaseContext.getCurrentId();
        //获得参数
        Object[] args = joinPoint.getArgs();
        if(args==null||args.length==0){
            return;
        }
        Object entity=args[0];
        //应用反射，调用方法
        if(operationType==OperationType.INSERT){
            try {
                entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_TIME, LocalDateTime.class).invoke(entity,now);
                entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_USER,Long.class).invoke(entity,id);
                entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class).invoke(entity,now);
                entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class).invoke(entity,id);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }else{
            try {
                entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class).invoke(entity,now);
                entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class).invoke(entity,id);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }
}
